Other processes can use the CPU while the caller is blocked.

(Roughly) how fast would the same render be using the CPU?

In most operating systems, provided the particular area of memory has the right properties, transfer can take place without using the CPU at all.

Processing the front involves dense matrix operations, which use the CPU efficiently.

Two of those data copies use the CPU.

These Macintosh computers used the 68000 CPU, a 32-bit processor, but only had 24 physical address lines.

Interrupts use the main CPU of the system.

But when that coding is done, the app runs on each device using the local CPU.

Later, control is returned to the kernel through some mechanism, so that another program may be allowed to use the CPU.

The second should use the fastest CPU, the best optical drive, a large hard drive, and a high-end video card.